Sandblast abrading machine



Oct A. J. KENNIEY 2,360,140

SAND BLAST ABRADING MACHINE Filed Jan. 5, 1944 2 Sheets-Sheet l INVENTOR.

U NE

Patented Got. 10, 1944 SANDBLAST ABRADING MACHINE.

Albert J. Kenney, New York, N. Y., assignor of one-half to Cora Almany Price. Washington,

Application January 3, 1944, Serial No. 516,786

11 Claims.

The invention aims to provide novel means whereby a spark plug may be held down, for blasting by an abrasive, for example, sand, it being possible, also, to hold down a hood which is disposed above the spark plug during the blasting operation. The invention aims, further, to provide novel means for mounting for adjustment, vertically, and for horizontal movement, the parts which cooperate as hereinbefore described, with the. hood and. with the spark plug.

The invention aims to provide a simple but elficient device of the class described which will savelabor, in that one operator, having the present device in charge, may attend to several structures of that kind- The invention aims, further, to provide novel means on one of the detents, for engagement directly with the spark plug. to hold it down.

It is. within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in. View, which will appear as the description proceeds, the invention resides in the combinationand arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changesinthe precise embodiment of the invention herein disclosed, may be made within the. scope of. what is claimed,

' without departing from the spirit of the invent'ion.

In the. accompanying drawings:

Fig 1 shows in side elevation, a device constructed in accordance with the invention;

Fig. 2 is a top plan;

Fig. 3 is a section on theline 3.3: of Fig. 1;

Fig- 4 is. a sectional view showin the. spark. plug, in place;

Fig. 5 is atop plan showing the jaw structure;

Fig. 6 is. a top plan showing. a modified J'aw structure; V

Fig. '7 is a top plan. showing a further modification in the jaw structure.

The sand blast abrading machine forming the. subject matter of this application contemplates the use of a bench I, or other support, in the top of which are mounted a plurality of casings 2, but one casing being, shown in the drawings. The casing comprisesa lid 33, disposed above the top of the bench I.

As best disclosed in Fig. 4, the lidv 3 is provided with a hole 4, in which issecured a resilient, tubular gasket 5, the bore 6v of which forms an opening shaped to receive awork piece,. such.

as a spark plug 1. There isa nozzle 8' in the casing 2, the nozzle constituting means for discharging a sand blast into the bore 6, and upon the spark plug 1.

The numeral 9 designates, generally, a member external to the casing 2 and engageable with the spark plug 1, to hold it in the opening 6. The part 9 is a radius member supported for swinging movement into and out of engagement with the spark plu 1.

The member 9 includes a rigid arm ill, pivotally supported at II on the lid 3 for swinging movement. A hollow, conical hood I2 is carried by the arm l0 and is disposable in blast-retarding position with respect to the opening 6.

When the arm II] is swung inwardly, to locate the hood l2 above the opening 6, the inward swinging movement of the armis stopped by a lug l4 On the arm, the lug coming into contact with a screw IE, or other adjustable abutment,

mounted on the lid 3. The arm II! is supplied with a protecting finger l6, adapted to bear upon the spark plug 1.

A detent I1 is supplied. The detent I1 is so mounted that it will come into engagement with the hood [2, and therefore with the member 9, to hold the finger IS on the arm It] in engagement with the end of the. spark plug 1, The detent I1 is supplied with a handle I8, of any desired size, whereby an operator may impart.

straight line sliding movement to it.

The numeral l.9 designates a guide mounting for the detent ll. made of any desired material, and may be constructed in various ways without departing from the spirit of the invention. Preferably, the

mounting l9 includes a base 20, secured'to the.

top of the bench l by attaching element 2 l. elongated cleat 22 is secured to the base 20.

The lower ends of oppositely-disposed uprights 23 are disposed against the outer edges of the cleat 22 and are fixed to the cleat by securing elements 24. The adjacent edges of the uprights 23 are spaced apart slightly, to afford guide slots 25. A cap bar 26 is located between the upper ends of the uprights 23, and is con,- nected thereto by securing members 21.

A means is provided for retaining the detent l! on the mounting IQ for straight line movement in a direction substantially at right angles to the axis of the opening 6, to the end that the detent may be advanced and retracted with respect to the hood l2. That means comprises washer plates 28, disposed on the outer surfaces of the uprights 23., and connected by draw bolts 29,

The mounting 19 may be.

. in line on the bench I.

It will be obvious that a vertical adjustment of the detent I! may be desirable, in order that the detent mayengage the hood l2, and in order that the finger l6 may engage the spark plug 1,

notice being taken of the fact that the spark plugs may be of different lengths. The washer plates 28 and the draw bolts 29 form a guide structure, which is adjustable in a direction parallel to the axis of the plug-receiving opening 6.

It may be desirable to hold down the spark plug"! before the member 9 is swung into the position of Fig. 1. The means to that end comprises a detent 30, having a handle 3|. The means 42 for mounting the detent 30 for adjustment parallel to the axis of the opening 6, and at right angles thereto, is of the kind described in connection with the detent l1, and, therefore, need not be set forth in detail. The detent 30, of course, must move from left to right in Fig. 1, in order to engage the spark plug 1, and an up and down movement of the detent 39 may be necessary, in order that it may engage properly with the spark plug. The detent 30 may be of any suitable construction, so that it will engage with the spark plug 1. For example, as shown in Figs. 4 and 5,,

the detent 39 may include compressible jaws 32, connected by a wing screw 33, the jaws being lined, along their inner surfaces, and upon their lower surfaces, as shown at 34, with soft material, which will prevent damage to the spark plug 1.

In the modification shown in Fig. 6, the detent 33a has jaws 32a, which are incompressible, the ling 34a being of the kind hereinbefore mentioned, and the handle being shown at 3la.

In Fig. 5, the inner surfaces of the jaws 32 are parallel, but they may converge inwardly, as shown in connection with the jaws 321). In Fig.

7, parts hereinbefore described have been desigengage spark plugs of different constructions.

longitudinally considered. The detent IT has the adjustments hereinbefore attributed to the detent 30 and holds the member 9 in the position shown in Fig. 1.

The part 35 in Figs. 2 and 1 is a removable closure, giving access to the casing 2. The opening shown at 36, and the arm and hood structure designated by the numeral 31 has to do with the blowing of the plug clean of sand, and need not be gone into in this document. The part 38 is a pressure gauge having the usual function.

The function of the hood I2 is to stop sand that may blow through the opening 6, about the spark plug 1. v

The member 9 not only carries the hood IZ but, as is known by those skilled in the art, it operates the valves (not shown) controlling the flow through the nozzle 8.

It has been stated hereinbefore that several of the casings 2 and attendant parts are mounted Consequently, heretofore, it has been necessary to have'one operator for each of the mechanisms. The following characteristics enable a plurality of blast-abrading machines, disposed in a line, to be tended by a single operator passing from machine to machine: the slides l1 and 39 are mounted for substantially horizontal, straight line reciprocation in the guide IS, the slides comprise manipulating parts external to the guide, and those parts are spaced vertically to such an extent that an operator may lay hold of either of them readily. The device, therefore, is a labor-saver, at a time when help is scarce.

Having thus described the invention, what is claimed is:

1. A blast abrading-mach ne comprising, a casing having an opening shaped to receive a work piece, a member external to the casing and engageable with a work piece to hold it in the opening, means for supporting said member for movement into and out of engagement with a work piece in the opening, a detent, a mounting for the detent and retaining it for movement into and out of engagement with said member, to hold said member engaged with a work piece in the opening, means in the casing for discharging an abrasive blast into'the opening,'said member being a radius arm having swinging movement, and a hood carried by the arm and disposable in blastretardin position with respect to the opening, the. detent being engageable with the hood.

2. A blast abrading-machine comprising a casing having an opening shaped to receive a work piece, a member external tothe casing and engageable with a work piece to hold it in the opening, means for supporting said member for movement into and out of engagement with a work piece in the opening, a detent, a mounting for the detent and retaining it for movement into I and out of engagement with said member, to hold said member engaged with a work piece in the opening, means in the casing for discharging an abrasive blast into the opening, said member being a radius arm having swinging movement,

' substantially at rightangles to the axis of the opening.

3. In a blast abrading-machine, a casing having an opening shaped to receive a work piece, a radius member, means forsupporting the radius member for swinging movement into and out of engagement with a work piece in the opening,'a

detent engageable with the radius member to hold it engaged with a work piece in the. opening, a mounting, a guide structure holding the detent for straight line sliding movementin a direction substantially at right angles to the axis of the opening, the guide structure being adjustable on the mounting in a direction substantially parallel to the axis of the opening, thereby to enable the detent to engage the radius member, when the radius member engages work pieces'of different lengths, and means in the casing for discharging an abrasive blast into the opening. 4. In a blast abrading-machine, a casing hav-. ing an opening shapedto receive a work piece, a detent, a mounting whereon the detent is movably carried for direct engagement with a work piece in the opening, a hood external to the casing, means formounting the hood for movement into blast-retarding positionwith respect to the opening, a second detent, meansrfor sup-;

5. A blast abrading-machine constructed as set forth in claim 4, in combination with guide structures receiving the respective detents for straight line movement in a direction substantially at right angles to the axis of the opening, the guide structures being independently adjustable on the mounting, in a direction substantially parallel to the axis of the opening.

6. A blast abrading-machine comprising a casing having an opening shaped to receive a work piece, a member external to the casing and engageable with a work piece to hold it in the opening, means for supporting said member for movement into and out of engagement with a Work piece in the opening, a detent, a mounting for the detent and retaining it for movement into and out of engagement with said member, to hold said member engaged with a work piece in the opening, means in the casing for discharging an abrasive blast into the opening, jaws on the detent, and shaped to receive a work piece, and a compressible linin on the inner working surfaces of the jaws, the lining being extended upon those surfaces of the jaws which are presented toward the opening.

7. A blast abrading-machine comprising a casing having an opening shaped to receive a work piece, a member external to the casing and engageable with a work piece to hold it in the opening, means for supporting said member for movement into and out of engagement with a work piece in the opening, a detent, a mounting for the detent and retaining it for movement into and out of engagement with said member, to hold said member engaged with a work piece in the opening, means in the casing fo discharging an abrasive blast into the opening, compressible jaws on the detent and shaped to receive a work piece, a lining on the inner, working surfaces of the jaws, the lining being extended upon these surfaces of the jaws which are presented toward the opening, and a tightening device connecting the jaws.

8. A blast abrading-machine comprising a casing having an opening shaped to receive a work piece, a member external to the casing and engageable with a work piece to hold it in the opening, means for supporting said member for movement into and out of engagement with a work piece in the opening, a detent, a mounting for the detent and retaining it for movement into and out of engagement with said member, to hold said member engaged with a work piece in the opening, means in the casing for discharging an abrasive blast into the opening, compressible jaws on the detent and shaped to receive a work piece, a lining on the inner working surfaces of the jaws, the lining being extended upon those surfaces of the jaws which are presented toward the opening, the inner edges of the jaws being ISO parallel, and a tightening device connecting the aws.

9. A blast abrading-machine comprising a casin having an opening shaped to receive a work piece, a member external to the casing and engageable with a work piece to hold it in the opening, means for supporting said member for movement into and out of engagement with a Work piece in the opening, a detent, a mounting for the detent and retaining it for movement into and out of engagement with said member, to hold said member engaged with a Work piece in the opening, means in the casing for discharging an abrasive blast into the opening, compressible jaws on the detent and shaped to receive a work piece, a lining on the inner, working surfaces of the jaws, the lining being extended upon those surfaces of the jaws which are presented toward the opening, the inner surfaces of the jaws converging backwardly from the free ends of the jaws, and a tightening device connecting the aws.

10. A blast abradin-g-machine comprising a casing having an opening shaped to receive a work piece, a member external to the casing and engageable with a work piece to hold it in the opening, means for supporting said member for movement into and out of engagement with a Work piece in the opening, a detent, a mounting for the detent and retaining it for movement into and out of engagement with said member, to hold said member engaged with a work piece in the opening, means in the casing for discharging an abrasive blast into the opening, oppositely disposed, rigid jaws on the detent and shapedto receive a work piece, and a lining on the inner, working surfaces of the jaws, the lining being extended upon those surfaces of the jaws which are presented toward the opening.

11. A blast abrading-machine comprising a casing having an opening shaped to receive a work piece, a guide mounted adjacent to the opening, a hood, means for mounting the hood for movement into and out of blast-retarding position with respect to the opening, a member external to the casing and engageable with a work piece to hold.,it in the opening, and a member external to the casing and constituting means for holding the hood in blast-retarding position, the following characteristics enabling a plurality of the blast-abrading machines, disposed in a line, to be tended by a single operator passing from machine to machine: the members specified being slides mounted for substantially horizontal, straight line reciprocation in the guide, the slides comprising manipulating parts external to the guide and spaced vertically to such an extent that an operator may lay hold of either of them readily.

ALBERT J. KENNEY. 

